Step 7: Assembling the Circuit

Step 8: The Program

The test program is just an edited version of the "Blink" example: /*--------------------------------------------------------------------------------...

Step 7: Assembling the Circuit

Your datasheet says which pins are E, B and C.
Before you connect your Arduino connect a 4.5V Batteries negative terminal to GND and its positive terminal to R1. The relay should make a clicking noise if not, check your circuit.